Metal Ions Doping for Boosting Luminescence of Lanthanide-Doped Nanocrystals

被引:24
|
作者
Pei, Shihao [1 ]
Ge, Xiaoqian [1 ]
Sun, Lining [1 ]
机构
[1] Shanghai Univ, Res Ctr Nano Sci & Technol, Coll Sci, Shanghai, Peoples R China
来源
FRONTIERS IN CHEMISTRY | 2020年 / 8卷
基金
中国国家自然科学基金;
关键词
metal ion doping; host lattice manipulation; energy transfer modulation; lanthanide doped nanocrystals; enhanced luminescence; UP-CONVERSION LUMINESCENCE; CONFINING EXCITATION-ENERGY; PHASE/SIZE MANIPULATION; FLUORESCENT-PROBES; QUANTUM DOTS; SHELL; NANOPARTICLES; EMISSION; RED; ENHANCEMENT;
D O I
10.3389/fchem.2020.610481
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
With the developing need for luminous materials with better performance, lanthanide-doped nanocrystals have been widely studied for their unique luminescence properties such as their narrow bandwidth emission, excellent chemical stability, and photostability, adjustable emission color, high signal-to-background ratio, deeper tissue penetration with less photo-damage, and low toxicity, etc., which triggered enthusiasm for research on the broad applications of lanthanide-doped nanocrystals in bioimaging, anti-counterfeiting, biosensing, and cancer diagnosis and treatment. Considerable progress has been made in the past few decades, but low upconversion luminescence efficiency has been a hindrance in achieving further progress. It is necessary to summarize the recently relevant literature and find solutions to improve the efficiency. The latest experimental and theoretical studies related to the deliberate design of rare earth luminescent nanocrystals have, however, shown the development of metal ion-doped approaches to enhance the luminescent intensity. Host lattice manipulation can enhance the luminescence through increasing the asymmetry, which improves the probability of electric dipole transition; and the energy transfer modulation offers a reduced cross-relaxation pathway to improve the efficiency of the energy transfer. Based on the mechanisms of host lattice manipulation and energy transfer modulation, a wide range of enhancements at all wavelengths or even within a particular wavelength have been accomplished with an enhancement of up to a hundred times. In this mini review, we present the strategy of metal ion-doped lanthanide nanocrystals to cope with the issue of enhancing luminescence, overview the advantages and tricky challenges in boosting the luminescence, and provide a potential trend of future study in this field.
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页数:11
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